<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>弹性盒子</title>
        <style>
            .wrapper{
                width: 1000px;
                height: 615px;
                border:5px dashed red;
                display: flex;
                flex-direction: row;
                flex-wrap: wrap;
                /* justify-content: center;
                justify-content: end;
                justify-content: flex-start;
                justify-content: space-around;
                justify-content: space-between;
                justify-content: space-evenly; */
                align-items:flex-start;
                align-items: flex-end;
                align-items: stretch;
                align-items: baseline;
                align-content: center;
            
            }
            .item{
                width: 200px;
                height: 200px;
                border:1px solid black;
                background-color: aquamarine;
            }
              
        </style>
    </head>
    <body>
        <div class="wrapper">
            <div class="item">1</div>
            <div class="item">2</div>
            <div class="item">3</div>
            <div class="item">4</div>
            <div class="item">5</div>
            <div class="item">6</div>
            <div class="item">7</div>
            <div class="item">8</div>
            <div class="item">9</div>
            <div class="item">10</div>
            
        </div>
    </body>
</html>